Debug mode of WDOG

[soichiyamamoto]

Hi,

I use Debug mode of WDOG, but WDOG timer does not stop evenif I set WDBG.

I set a register of WDOG in the following procedure.

①WDOG timer start：WDOG_WCR=0x3F34

②Suspend the watchdog timer(Debug mode)：WDOG_WCR=0x3F32　or 0x3F36

      ※WDOG_WCR regster read is WDOG_WCR[WDBG] = 0. 

Q1)Is this setting procedure right?

Q2)Please ｇive me a sample program of the WDOG setting.

Best regards,

soichi

[juangutierrez]

I will try to check for a sample.

Meanwhile make sure you have the right address of the WDOG_BASE in the next file

\MVF50GS10MK50.h

Is wrongly pointing to 0x0, so you should remove that and add the correct base address as follows

#ifdef ARMCC_A5

#define WDOG_BASE                                (0x4003E000u)

#else /* M4 */

#define WDOG_BASE                                (0x4003F000u)

#endif

[soichiyamamoto]

Hi,

Thank you for reply.

I use the following setting.

"#define WDOG_BASE                                (0x4003E000u)"

Sorry, Please try to consider it.

Best regards,

soichi

[juangutierrez · Accepted solution]

Hi

In Reference Manual there is a mismatch in section 26.6.1 Watchdog Control Register (WDOG_WCR) between the table and the graphic for WCR register

Dismiss the graphic. Table provides the correct information.

Besides that, I think your code is fine for a timeout around 32s

However take into consideration that the power-down counter is not affected by debug mode entry/exit.

For example, check next code

void wdbg_test()

{

  reset_occurred = 0;

  interrupt_handlers[128]= INTR_ROUTINE;  // reset_occurred will be set inside this routine

  SRC.SICR.B.WDOG_RST = 0x01;            //Configure WDOGA5 reset as interrupt

  // Starting WDOG debug mode test case

  WDOGA5.WCR.R = 0x2736;                      //timeout 20s

  printf("Start watchdog");

  WDOGA5.WCR.B.WDE = 1;

  printf("Wait here in debug mode for 20s... reset should not come");

  //To continue: Manually disable the WDBG here

  while(reset_occurred != 1);                            //Wait here for interrupt

}